全方向き裂を探傷可能な磁粉探傷試験用マルチコイル型磁化器の開発

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2015/12/01

タイトル(英語): Development of Multi Coil Magnetizer for Magnetic Particle Testing of Omnidirectional Crack

著者名: 福岡　克弘（滋賀県立大学），小林 　正樹（電子磁気工業（株）），尾崎　智裕（電子磁気工業（株）），及川　芳朗（電子磁気工業（株））

著者名(英語): Katsuhiro Fukuoka (The University of Shiga Prefecture), Masaki Kobayashi (Denshijiki Industry), Tomohiro Ozaki (Denshijiki Industry), Yoshiro Oikawa (Denshijiki Industry)

キーワード: 磁粉探傷試験，回転磁界，マルチコイル，磁化，数値解析，有限要素法　　magnetic-particle testing，rotating magnetic field，multi coil，magnetization，numerical analysis，finite element method

要約(英語): The maximum magnetic flux leakage from a crack is obtained when the magnetic flux is distributed to the longitudinal direction of the crack in the orthogonal direction. In magnetic-particle testing with a yoke method, since we usually cannot predict the direction of the crack to be detected, it is necessary to perform the testing at least two times by changing the direction of magnetization. In a rotating magnetic field type magnetizer using a three-pole coil (a three-phase alternating current), omnidirectional crack can be detected by a single testing. However, the rotating magnetic field becomes no homogeneous distribution at a position far from the center of the magnetizer, and the strong magnetic field is generated in a specific direction. In this research, the multi coil magnetizer that widely obtained uniform rotating field distribution was developed. The distribution of the rotating magnetic flux density on the steel plate was evaluated with a finite element method analysis. In addition, a prototype magnetizer was produced based on the analytical results, and the characteristic was evaluated.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.135 No.12 （2015） 特集：スマートな社会を支える最新計測技術

本誌掲載ページ: 786-791 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/135/12/135_786/_article/-char/ja/